Nut-lock.



v than one section through one end Aer oFFioE.

FRANKLIN J. FLETCHER AND WILLIAM W. HOCKER, OF COLOMA, MICHIGAN.

NUT- LOCK.

Specification of Letters Patent.

Patented July 14, 1908.

Application filed February 28, 1908. Serial No. 418,283.

To all whom it may concern:

Be it known that we, FRANKLIN J. FLETCHER and WILLIAM W. HooKER, residing at Coloma, in the .county of Berrien and State of Michigan, have invented certain new and useful Improvements in Nut-Locks and we do hereby declare .the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. p

This invention relates to lockingdevice for holding nuts on bolts; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed. v. I I In the drawings, Figure 1 is'a lon itudinal and its nut, provided Wit a locking-spring according to this invention. Fi 2 is a side view of the same. Fig.3 is an one view of the nut, showing'the bolt in section. Fig. 4 is a detail side view of'the'locking-spring.

A is a screwthreaded bolt of any approved make, and B is its nut. The bolt A has a fiat-bottomed grooveor key-way C out in one side of its screwthreaded end ortion c. The bottom of this groove is paralle with the I axis of the bolt, and the groove has a shoulder cl at its upper end;

The nut B as a tapering groove ornotch e cut in its sorewthreaded portion so that it can register with the groove C,,'and the x deeper end of the notche is arranged at the top of the nut. As many similar grooves e as desired may be cut in the nut, and more groove 0 may be cut in the bolt,'if desired i' E is. a. locking-spring which is inserted in the grooves C and e from the top of the nut.

The groove is made longer than .the depth of the nut, sothat 'a'portion of it is exposed above the nut when the nut is screwed u The locking-spring E has a tongue f which projects from its lower end g, and which is arranged at an acute angle toits main portion.

Thelug t is substantially 'aral el to the main portion of the spring, an it projects on the ortion o' a bolt,

At its upper end the main portion of .the locking-spring is provided with a lateral opposite side of the part it from its said main portion.

-VVhen the nut is screwed up, and theis pushed downwar until the locking-spring engages with the grooves as shown in Fig. 1. The projection h then comes against the shoulder a, and the point of the tongue en-.

gages with the. notch e. This prevents the nut from. being turned in either direction.

When the nut is to be removed, the main portion of the locking-spring is pulled forward. by means of the lug i, which prof'ects from the groove C above the nut, unti projection h is clear of the shoulder d. The coking-spring can then be slid upwardly out of engagement with the said grooves.

- What we claim is:

1. In a nut-lock, the combination, With a nut rovided with a notch, and a bolt provide( with a groove having a shoulder; of a locking-spring formed of a continuous stri of sheet metal of e ual thickness and widt throughout its lengt said strip being bent double to form a spring-tongue at one end, and having its other end portion bent laterally to form a stop and longitudinally to form a lug at the end of the stop.

2. In a nut-lock, the combination, with a thickness and width throughout its length,

said strip being bent double to form a spring tongue which engages with the said notch,

the

said strip having an end portion bent over to form a stop which. bears against the said shoulder, and having also a lug Whichprojects from the free end of the said stop tudinally of the main portion of t strip. a I In testimony whereof we afiix our signatures, in presence of two witnesses.

FRANKLIN) 'J. FLETCHER. WILLIAM w. HOOKER. I

Witness es:

HENRY S. OnUMB, ALLEN W. BAKER.

e said longi- 

